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AUSCERT External Security Bulletin Redistribution
ESB-2023.0689
USN-5825-2: PAM regressions
7 February 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: PAM
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2022-28321
Original Bulletin:
https://ubuntu.com/security/notices/USN-5825-2
Comment: CVSS (Max): 9.8 CVE-2022-28321 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: NVD
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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USN-5825-2: PAM regressions
6 February 2023
USN-5825-1 caused some minor regressions in PAM.
Reduce your security exposure
Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and
Universe repositories, and it is free for up to five machines.
Learn more about Ubuntu Pro
Releases
o Ubuntu 22.10
o Ubuntu 22.04 LTS
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 ESM
o Ubuntu 14.04 ESM
Packages
o pam - Pluggable Authentication Modules
Details
USN-5825-1 fixed vulnerabilities in PAM. Unfortunately that update was
incomplete and could introduce a regression. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
It was discovered that PAM did not correctly restrict login from an IP
address that is not resolvable via DNS. An attacker could possibly use this
issue to bypass authentication.
Reduce your security exposure
Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and
Universe repositories, and it is free for up to five machines.
Learn more about Ubuntu Pro
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 22.10
o libpam-modules - 1.5.2-2ubuntu1.3
Ubuntu 22.04
o libpam-modules - 1.4.0-11ubuntu2.3
Ubuntu 20.04
o libpam-modules - 1.3.1-5ubuntu4.6
Ubuntu 18.04
o libpam-modules - 1.1.8-3.6ubuntu2.18.04.6
Ubuntu 16.04
o libpam-modules - 1.1.8-3.2ubuntu2.3+esm4
Available with Ubuntu Pro
Ubuntu 14.04
o libpam-modules - 1.1.8-1ubuntu2.2+esm3
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References
o CVE-2022-28321
o https://launchpad.net/bugs/2006073
Related notices
o USN-5825-1 : libpam-modules-bin, libpam-runtime, libpam-modules,
libpam-doc, libpam-cracklib, libpam0g, pam, libpam0g-dev
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===========================================================================
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The University of Queensland
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